Pipe wrench



' ,513,060 Oct. 28 924 A. F. MUTH PIPE WRENCH Fil ed June 13, 19

m a; f 3 10 a [in Q; h I W- ll Z 26 l l H, A??? I in i 19 I a Patented @ct. 28, 1924.

1 re M a ANTHONY F. MUTH, OF ELDOBADO, KANSAS, ASSIGNQR 0F FIVE-SIXTEENTHS TO JOHN J. MUTE, TNO-SIXTEENTHS TO W'ILFRED H. MUTE, AND O'NE-SIXTEENTI-I TO CHARLES A. MUTI-I, ALL OF ELDGBADO, KANSAS.

PIPE WRENCH.

Application filed. June 13, 1923. Serial No. 645,111.

To all whom it may concern:

Be it known that I, ANTHONY F. MUTH, a. citizen of the United States, residing at Eldorado, in the county ot Butler and State of Kansas, have invented certain new and useful Improvements in Pipe Wrenches, of which the following is a specification.

This invention relates to an improved pipe wrench and seeks, as one of its principal objects, to provide a device of this character which will be relatively light in weight and yet adapted for heavy work, the device being particularly designed for use in the manipulation of deep well casing.

The invention seeks, as a further object, to provide a wrench wherein slipping of the tool will be eiiectually prevented.

Another object of the invention is to provide a tool which may be suspended in a position for use, and which, when manually released or freed, will not turn over edgewise out of operative relation to the casing to be gripped by the device The invention seeks, as a still further object, to provide a wrench wherein the force applied to the wrench for turning the casing will be utilized for causing the wrench to grip the casing but wherein crushing of the casing will be obviated.

And the invention seeks, as a still further object, to provide a wrench of such struc tural simplicity that. without undue cost, separate casing encircling members may be employed for each size of casing, thus doing away with the use of liners, as are commonly employed, and reducing the weight of the device so that the wrench may be readily handled. Other and incidental objects will appear hereinafter.

In the drawings:

Figure 1 is a plan view showing my improved wrench engaged with an ordinary well casing, parts being broken away and illustrated in section.

Figure 2 is an edge elevation of the wrench, and

Figure 3 is a view similar to Figure 1 butshowing the wrench open.

In carrying the invention into effect, I employ a lever or handle gradually widened toward its forward end and provided at one edge thereof with a longitudinally directed lug 11 formed at its inner edge with angnlarly disposed faces 12 and 13. Pivoted upon said lug is a yoke 14 having a squared longitudinally tapered stem or dog 15 carrying a removable end plate 16. At the base 0t said dog, the yoke is provided with a flat face or shoulder 17 and formed in the dog is a longitudinally directed slot 18. Slidably fitting over the dog is a segmental jaw 19 having a medial tapered opening to receive the dog and extending through the jaw and through the slot 18 of said dog is a pin 20 slidably connecting the jaw with the dog. At its outer side, the jaw is provided with a flat'face 21 to confront the face 17 of the yoke and formed on the jaw at one end thereof is a hinge lug 22. Pivoted upon the forward corner of the handle 10 opposite the lug 11 is a yoke 23 having a stop lug 2 and pivoted upon said yoke are companion pivotally connected resilient straps 25 and 26, the strap 26 being provided with a stop lug 27 to engage the adjacent end of the strap 25 for limiting outward pivotal movement of the strap 26. The strap 26 carries a handle 28 and formed on said strap at its free end are spaced hinge lugs 29 adapted to mate with the lug 22 of the jaw 1.9 for receiving a pin pivotally connecting said strap with the jaw. Preferably, the pin is flexibly connected with the jaw by a short length of chain 31 or othersimilar element to prevent accidental loss oi the pin. It is now to be noted that the straps 25 and 26 are thickened toward the ends thereof for standing the strain thereon at the hinge lugs of said straps. Furthermore, it is to be noted that when the strap 26 is detached from the jaw 19, the yoke 23 may be swung for moving both of the straps 25 and 26 away from the jaw. However, as previously noted, the strap 26 will be limited in its outward movement upon the strap 25 by the lug 27 while the strap 25- will be limited in its outward movement upon the yoke by the lug 24. In like manner, the yoke will be limited in its outward movement upon the lever by the engagement of the yoke with the adjacent side edge of the lever so that the straps 25 and 26 will thus be prevented from swinging away from the jaw in such manner thatthe strap 26 cannot be conveniently grasped and connected to the jaw. For a similarreason, the. face, 12. upon the lug l1 is provided to enact with the yoke 1% for limiting the yoke and consequently the jaw 19, against inward swinging movement while, as will be seen, the face 13 of said lug will coact with the yoke limiting the jaw and yoke against outward swinging movement.

In the drawings, 1 have shown my i1n-- proved wrench in conjunction with an ordinary well casing 32, the device being applied to the casing or removed therefrom by displacing the pin 30. Rotatably fitting through the lever 10 near the forwardend thereof is a medially disposed eye bolt 8-3 which is preferably detachably connected with the lever and attached to said eye bolt is a chain or like element 34 suspending the wrench from the well ri The bolt is so disposed that the wrench will balance thereon longitudinally as well as laterally and by limiting the outward swinging movement of the straps 25 and 26 as well as the jaw 19, these parts will be prevented from shifting to a position unduly tending to tip the wrench over edgewise. Accordingly, when the wrench is freed, the wrench will be supported in operative relation to the well casing. Connected to the lever 10 at the outer end thereof is a ring 35 which is provided in order that a jerk line, as conventionally illustrated at 36, may be con veniently connected to the lever, the jerk line being equipped with a hook 87 to engage through the ring.

Referring now particularly to Figure l of the drawings, it will be seen that when the wrench is applied to the casing 32, the straps 25 and 26 will cooperate with each other and with the jaw 19 to forma split clamping band substantially encircling the casing. initially, the dog 15 will, of course, be retracted. However, as will be seen, when the lever is swung by a pull upon the jerk line 36, the dog will be projected at the inner face of the 19 to sink the teeth of the face plate 16 into the casing while the split'band formed by said aw' and the straps 25 and 26 will be tightened around the casing. As the force upon the lever is increased, tightening of said band will, of course, be correspondingly increased while the teeth of the face plate of the dog will be caused. to further sink into the casing so that slipping of the wrench will be effectually prevented. However, the dog will be limited in its inward movement through the jaw by the engagement of the flat face 17 with the face 21 of the jaw so that the dog cannot be advanced to injure the casing. It will accordingly be seen that l have provided a very simple and effective wrench for the purpose set forth and attention is now directed to the fact that, as compared with ordinary well casing wrenches, the present wrench is comparatively light in weight. Consequently, the wrench maybe Having thus described the invention, what is claimed as new is:

1. A pipe wrench including a lever, a split clamping band connected at one end to the lever, and a dog carried by the lever and connecting the opposite end portion of the band with the lever and movable radially of the band to impinge against a pipe clamped thereby.

2. A pipe wrench including a lever, a split clamping band connected at one end to the lever, and means slidably connect-ed vith the opposite end portion of the band to operatively connect said end portion of the band with the lever and movalle radially of the band to impinge against a pipe clamped thereby.

3. A pipe wrench including a lever, a split clamping band connected at one end to the lever and having its opposite end constituting a detachable jaw, and means pivotally connecting said jaw with the lever including a dog slidable through the jaw to engage apipe clamped by the band.

a. A pipe wrench including a lever, a split clamping band connected at one end to the lever and constituting a detachable jaw at its opposite end, a yoke pivotally connecting said jaw with the lever and provided with a stem forming a dog slidably fitting through the jaw, and means coacting between the jaw and dog connecting thejaw witli the yoke, the dog being adapted toproject at the inner face of the jaw to engage a pipe clamped by the band.

0. A. pipe wrench including a lever provided at its working end with a longitudinally extending lug having meeting stop faces in angular relation, a yoke pivoted on said lug and having a fiat face arranged to abut either stop face on the lug, a dog carried by said yoke and adapted to engage a pipe tobe turned, a jaw slidably mounted on said dog to engage the pipe to be turned.

a yoke pivoted to the lever in spaced relation to the first mentioned yoke and having a stop lug, a strap pivoted to the second yoke and having a stop shoulder, and a second strap pivoted to the first-mentioned strap and having a coacting stop shoulder and detachably pivoted to the jaw.

6. A pipe wrench including a lever provided at its working end with a longitudinally extending lug having stop faces in angular relation, a yoke pivoted on said lug and having a flat face arranged to abut either stop face on the lug, a dog carried by said yoke and adapted to engage a, pipe to be turned, a jaw slidably mounted on said dog to engage the pipe to be turned the jaw and the yoke having coacting stop faces, a yoke pivoted to the lever in spaced relation to the first-mentioned yoke, a strap pivoted to the second yoke, and a second strap pivoted to the first-mentioned strap 10 and detachably pivoted to the jaw. y In testimony whereof I aflix my signature.

ANTHONY F. MUTH. [LS-1 

